Electric forging hammer



June 8, 1937. E. LARSON ELECTRIC FORGING HAMMER Filed Deb. 26, 1935 3Sheets-Sheet l Invenlor E. Zea/J0 A Hamel) June 8, 1937. LARSON 2,083,18ELECTRIC FORGING HAMMER I I Filed Dec. 26, 1955 a Sheets-Sheet 2 l I l Ailomey June 8, 1937. E, L RS 2,083,168

ELECTRIC FORGI NG HAMMER Filed Dec. 26, 1935 3 Sheets-Sheet 3 Inventor Allorney Patentedlune 8, 1937 UNlTED sTArss ELECTRIC FORGING HAMMEREdward Larson, Austin, Nev., assignor of onefourth to H. F. Connelly,one-fourth to William East, and one-fourth to J. B. Sibbald,

Austin, Nev.

Application December 26, 1935, Serial No. 56,275

1 Claim.

My invention relates generally to electric hammer means, andparticularly to an electric-magnetically operated forging hammer, and animportant object of the invention is to provide a simple, rugged, andefficient device of this character which can be produced and operated atrelatively low cost.

Another important object of the invention is to provide a mechanicallyefficient arrangement of the character indicated above in which theparts are easily accessible for repair or replacement.

Other important objects of my invention will be apparent from a readingof the following description in connection with the drawings, whereinfor purposes of illustration I have shown a preferred embodiment of myinvention.

In the drawings:-

Figure 1 is a general diagrammatic representa tion of the electricwiring and connections of the embodiment.

Figure 2 is a side elevational View of the embodiment.

Figure 3 is a transverse vertical sectional view taken through Figure 2and looking from left to right.

Figure 4 is a side elevational view of the tube and its supports andflanges.

Figure 5 is a side elevational view of the piston or core and thehammer.

Figure 6 is a transverse vertical sectional view taken through the core.

Figure 7 is a transverse vertical sectional View taken through thehammer.

Figure 8 is a plan view of the manual operating lever or switch.

Referring in detail to the drawings, the letter A generally designatesthe upper coil and the letter B the lower coil of the piston operating40 assembly. For six to eight volts operation these coils are wound withNo, 10 gauge wire. These coils are wound on a brass hollow cylinder I inwhich works the piston or core 4 which is made preferably of steeltubing and has screwed into its opposite ends the solid magneticallypermeable heads 2 and 3.

The lower end 3 is axially threaded to receive the upper end of thepiston rod 5 whereby the piston is operatively connected to the piston4.

59 The rod 5 is preferably of steel and has its lower end threaded asindicated in the top of the hammer 6 which is or" steel.

The hammer operates in conjunction with the anvil l which is preferablya steel block and 55 has wound thereon the coil C which is wound to giveanvil l the same magnetic effect as the hammer 6, so as to make theanvil neutral so that the magnetized hammer will not stick to it. Thecoil C is a tandem wound coil and comes into action at the same timethat the coil A. 5

The numeral 9 generally designates a manually operating lever or switchlever which is pivotally mounted as indicated by the numeral 9 to asuitable support.

The numeral ill designates the contact point 10 which is connected tothe wire 15 which leads to the inside winding of the coil A, and thiscontact is also connected to the wire I! which leads to the coil C.

The numeral H designates the contact point 15 which is connected to thewire it which leads to the inside winding of the coil C.

The numerals l2 and i2 designate the contact points on the lever 9 whichengage respectively the contact points 10 and H. 20

The wire 14 leads from the contact l2, l2 to the negative post on anenergizing battery such as a storage battery. The wire l3 leads from thetwo outside windings oi the coils A and B to the positive post on thebattery, while the 25 wire it leads from the coil C to the wire 13.

Referring particularly to Figure i, there istherein shown. the brasscylinder 1 with the brass flanges 20, 2| and 22, the flanges 25] and 22acting as brackets to fasten the coils to the 30 support 23 as shown inFigure 2 and the brass flange 2i acting as a separator between the coilsA and C.

To operate the device of the invention, the lever 9 is raised so as tobring the contact points I2 and [0 into contact so as to cause electriccurrent to flow from the battery through the coils A and C, therebymaking the anvil neutral to the hammer and causing a strong magneticattraction in the coil A, so as to cause the piston to be drawn upwardlyinto a position in which the upper end of the core or piston is abovethe tube. By moving the lever downwardly so as to engage the contact i2with the contact H, elec tric current is caused to flow from the batterythrough the coil B. which causes a strong magnetic attraction, followingthe lapse of the attraction in the cell A, so that the piston is drawndownwardly so that the hammer is forced downwardly with a striking blowtoward the anvil. These operations can be performed almost as quickly asa person can manipulate the lever 9 up and down by hand.

Although I have shown and described herein a preferred embodiment of myinvention, it is to be with said hammer head, an electrical windingsurrounding said anvil, a source of electrical supply, a switch, saidsource of electrical supply and said switch being included in circuitwith the windings of the solenoids for selectively energizing saidwindings for effecting a reciprocating movement of said armature, andsaid Winding of the anvil being connected in circuit with said source ofsupply and said switch and adapted to be energized simultaneously withthe energiza- 10 tion of one of the windings of the solenoids.

EDWARD LARSON.

